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UNITED STATES PATENT onmon.

JOSEPH ZBY'INIEWSKI AND BOLESLAUS TRZCINSKI, 0F PHILADELPHIA, PENNSYL- VANIA, AND FRANK J. HEJNA, OF TRENTON, NEW JERSEY.

LATCH.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Application filed October 18, 1915. Serial No. 56,383.

To all whom it may concern:

Be it known that we, Josnrn Znr'rnrnwsnr and BOLESLAUS Tnzcmsnr, citizens of the United States residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, and FRANK J. HEJNA, a citizen of the United States, residing at Trenton, county of Mercer, and State of New Jersey, have invented certain new and useful Improvements in Latches, of which the following is a specification.

Our invention relates to improvements in latches, the object of the invention being to provide an improved knob latch in which the movement of the knob spindle longitudinally causes the retractile movement of the latch bolt.

A further object is to provide improvements of the character stated which can be manufactured and sold at a reasonably low price, and which will be most efiicient 1n the performance of the functions for which it is intended.

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1 is a view in longitudinal section illustrating our improvements. Fig. 2 is a fragmentary view in section on the line 22 of Fig. 1, and Fig. 3 is a view in section on the line 53-3 of Fig. 1.

1 represents a door or other member to which our improved lock case 2 is secured in any approved manner.

3 is the latch spindle which is angular throughout the greater portion of its length and projects through registering openings 4 and 5 in the lock case, and through an opening 6 in the door 1. On the outer face of the door 1, an escutcheon 7 is secured by screws 8, and is provided with a central recess 9 receiving the hub 10 of the outer knob 11. The extreme inner wall of the recess 9 is provided with an angular opening 12 through which the spindle 3 projects, and the lower wall of this opening 12 is recessed as shown at 13, so that a pin 14 fixed to spindle 3 can move into and out of operative osition in assembling the parts. The inner ob 15 has a screw-threaded hub 16 screwed onto the threaded end 17 of spindle 3, and against a washer 18, so that any desired adustment of the knob can be had relative to the spindle in accordance with the thickness of the door and to properly adjust the parts. In the case 2, a latch bolt 19 is located, the outer beveled end 20 movable through an opening 21 in the end of the lock case, and the inner restricted diameter of said latch bolt projected through a plate 22 and secured to a block 23. This block 23 has a longitudinal slot 24 therein into which a lug 25 integral with one side of the lock case projects, so that the block is secured to move in a horizontal path. In the upper face of the block 23, a cam groove 27 is provided, and into this groove 27 the pin 14 on spindle 3 projects. The plate 22 above referred to has its ends positioned in notched lugs 28 fixed in any approved manner to the case, and a coiled spring 29 is located around the latch bolt between the enlarged outer end and the plate 22, and exerts a constant pressure on the latch bolt normally holding the same in its outward position. When the spindle 3 is moved longitudinally in one direction, it will cause the inward or retractile movement of the latch boltby reason of the fact that the pin 14 engages in the cam groove 27, so that instead of turning the knob as is customary, it will be moved longitudinally. When it is desired to draw the door to closed position by exerting a pull on the outer knob 11, the operator grips with his fingers the escutcheon 7 so as to permit the spindle a longitudinal movement in a direction to allow the latch bolt to retract, because when the door reaches its closed position, the latch bolt will move inwardly by reason of its beveled face 20 as is well understood. In order to facilitate the gripping action of the escutcheon 7, the latter is preferably made with an annular groove 30, although it may, of course, be otherwise shaped as desired.

Various slight changes might be made in the general form and arrangement of parts described without departing from our invention, and hence we do not limit ourselves to the precise details set forth, but consider ourselves at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. The combination with a case, a latch bolt movable in the case, a block secured to the latch bolt and movable in the case, a pair of lugs on the case, a plate engaging said lugs, and having an opening therein through which the latch bolt is movable, a

coiled spring around the latch bolt bearing therein, a guide pin fixed to the lock case and prO ecting 1nto the slot, said block having a cam groove in its upper face, a spindle movable through the lockcase, a pin on the v spindle engaging in the groove, a plate having an opening therein through which the latch bolt moves, and a spring around the latch bolt engaging the plate normally holding the latch bolt in its outward position, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

JOSEPH ZBYTNIEWSKI. BOLESLAUS TRZCINSKI. FRANK J. HEJNA.'

Witnesses:

C. E. POTTS, MARIE JACKSON. 

